Datasheet MC14559BCL, MC14559BCP, MC14559BDW, MC14549BCL, MC14549BDW Datasheet (Motorola)

MOTOROLA CMOS LOGIC DATA
1
MC14549B MC14559B
  
The MC14549B and MC14559B successive approximation registers are 8–bit registers providing all the digital control and storage necessary for successive approximation analog–to–digital conversion systems. These parts d iffer in only one control i nput. T he Master Reset ( MR) on the MC14549B is required in the cascaded mode when more than 8 bits are desired. The Feed Forward (FF) of the MC14559B is used for register shortening where End–of–Conversion (EOC) is required after less than eight cycles.
Applications for the MC14549B and MC14559B include analog–to–digital conversion, with serial and parallel outputs.
Totally Synchronous Operation
All Outputs Buffered
Single Supply Operation
Serial Output
Retriggerable
Compatible with a Variety of Digital and Analog Systems such as the
MC1408 8–Bit D/A Converter
All Control Inputs Positive–Edge Triggered
Supply Voltage Range = 3.0 Vdc to 18 Vdc
Capable of Driving Two Low–Power TTL Loads, One Low–Power
Schottky TTL Load or Two HTL Loads Over the Rated Temperature Range
Chip Complexity: 488 FETs or 122 Equivalent Gates
MAXIMUM RATINGS* (Voltages referenced to V
SS
)
Rating
Symbol Value Unit
DC Supply Voltage V
DD
– 0.5 to + 18 Vdc
Input Voltage, All Inputs V
in
– 0.5 to VDD + 0.5 Vdc
DC Input Current, per Pin I
in
± 10 mAdc
Power Dissipation, per Package† P
D
500 mW
Operating Temperature Range T
A
– 55 to + 125
_
C
Storage Temperature Range T
stg
– 65 to + 150
_
C
*Maximum Ratings are those values beyond which damage to the device may occur. †Temperature Derating:
“P and D/DW” Packages: – 7.0 mW/C From 65_C To 125_C Ceramic “L” Packages: – 12 mW/_C From 100_C To 125_C
SC SC(
t–1
) MR MR(
t–1
) Clock Action
X X X X None X X 1 X Reset 1 0 0 0 Start
Conversion
1 X 0 1 Start
Conversion
1 1 0 0 Continue
Conversion
0 X 0 X Continue
Previous Operation
TRUTH TABLES
MC14549B
X = Don’t Care t–1 = State at Previous Clock
SC SC(
t–1
) EOC Clock Action
X X X None 1 0 0 Start
Conversion
X 1 0 Continue
Conversion
0 0 0 Continue
Conversion
0 X 1 Retain
Conversion Result
1 X 1 Start
Conversion
MC14559B

SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 1995
REV 3 1/94
 
L SUFFIX
CERAMIC
CASE 620
ORDERING INFORMATION
MC14XXXBCP Plastic MC14XXXBCL Ceramic MC14XXXBDW SOIC
TA = – 55° to 125°C for all packages.
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
PIN ASSIGNMENT
13
14
15
16
9
10
11
125
4
3
2
1
8
7
6
Q0
Q1
Q2
Q3
V
DD
SC
*
EOC
Q7
Q6
Q5
Q4
V
SS
C
D
S
out
*For MC14549B Pin 10 is MR input.
For MC14559B Pin 10 is FF input.
MOTOROLA CMOS LOGIC DATAMC14549B MC14559B
2
ELECTRICAL CHARACTERISTICS (Voltages Referenced to V
SS
)
V
DD
– 55_C 25_C 125_C
Characteristic
Symbol
DD
Vdc
Min Max Min Typ # Max Min Max
Unit
Output Voltage “0” Level
Vin = VDD or 0
V
OL
5.0 10 15
— — —
0.05
0.05
0.05
— — —
0 0 0
0.05
0.05
0.05
— — —
0.05
0.05
0.05
Vdc
“1” Level
Vin = 0 or V
DD
V
OH
5.0 10 15
4.95
9.95
14.95
— — —
4.95
9.95
14.95
5.0 10 15
— — —
4.95
9.95
14.95
— — —
Vdc
Input Voltage # “0” Level
(VO = 4.5 or 0.5 Vdc) (VO = 9.0 or 1.0 Vdc) (VO = 13.5 or 1.5 Vdc)
V
IL
5.0 10 15
— — —
1.5
3.0
4.0
— — —
2.25
4.50
6.75
1.5
3.0
4.0
— — —
1.5
3.0
4.0
Vdc
“1” Level (VO = 0.5 or 4.5 Vdc) (VO = 1.0 or 9.0 Vdc) (VO = 1.5 or 13.5 Vdc)
V
IH
5.0 10 15
3.5
7.0 11
— — —
3.5
7.0 11
2.75
5.50
8.25
— — —
3.5
7.0 11
— — —
Vdc
Output Drive Current
(VOH = 2.5 Vdc) Source (VOH = 4.6 Vdc) (VOH = 9.5 Vdc) (VOH = 13.5 Vdc)
I
OH
5.0
5.0 10 15
– 1.2 – 0.25 – 0.62
– 1.8
— — — —
– 1.0 – 0.2 – 0.5 – 1.5
– 1.7
– 0.36
– 0.9 – 3.5
— — — —
– 0.7 – 0.14 – 0.35
– 1.1
— — — —
mAdc
(VOL = 0.4 Vdc) Sink (VOL = 0.5 Vdc) Q Outputs (VOL = 1.5 Vdc)
I
OL
5.0 10 15
1.28
3.2
8.4
— — —
1.02
2.6
6.8
1.76
4.5
17.6
— — —
0.72
1.8
4.8
— — —
mAdc
(VOL = 0.4 Vdc) Sink (VOL = 0.5 Vdc) Pin 5, 11 only (VOL = 1.5 Vdc)
5.0 10 15
0.64
1.6
4.2
— — —
0.51
1.3
3.4
0.88
2.25
8.8
— — —
0.36
0.9
2.4
— — —
mAdc
Input Current I
in
15 ±0.1 ±0.00001 ±0.1 ±1.0 µAdc
Input Capacitance C
in
5.0 7.5 pF
Quiescent Current
(Per Package) (Clock = 0 V, Other Inputs = V
DD
or 0 V, I
out
= 0 µA)
I
DD
5.0 10 15
— — —
5.0 10 20
— — —
0.005
0.010
0.015
5.0 10 20
— — —
150 300 600
µAdc
Total Supply Current**†
(Dynamic plus Quiescent, Per Package) (CL = 50 pF on all outputs, all buffers switching)
I
T
5.0 10 15
IT = (0.8 µA/kHz) f + I
DD
IT = (1.6 µA/kHz) f + I
DD
IT = (2.4 µA/kHz) f + I
DD
µAdc
#Noise immunity specified for worst–case input combination.
Noise Margin for both “1” and “0” level = 1.0 V min @ VDD = 5.0 V
= 2.0 V min @ VDD = 10 V = 2.5 V min @ VDD = 15 V
†To calculate total supply current at loads other than 50 pF:
IT(CL) = IT(50 pF) + 3.5 x 10–3 (CL = 50) VDDf where: IT is in µA (per package), CL in pF, VDD in V, and f in kHz is input frequency. **The formulas given are for the typical characteristics only at 25_C.
This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation it is recommended that Vin and V
out
be constrained to the range VSS v (Vin or
V
out
) v VDD.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD).
MOTOROLA CMOS LOGIC DATA
3
MC14549B MC14559B
SWITCHING CHARACTERISTICS* (C
L
= 50 pF, TA = 25_C)
Characteristic
Symbol V
DD
Min Typ Max Unit
Output Rise Time
t
TLH
= (3.0 ns/pF) CL + 30 ns
t
TLH
= (1.5 ns/pF) CL + 15 ns
t
TLH
= (1.1 ns/pF) CL + 10 ns
t
TLH
5.0 10 15
— — —
180
90 65
360 180 130
ns
Output Fall Time
t
THL
= (1.5 ns/pF) CL + 25 ns
t
THL
= (0.75 ns/pF) CL + 12.5 ns
t
THL
= (0.55 ns/pF) CL + 9.5 ns
t
THL
5.0 10 15
— — —
100
50 40
200 100
80
ns
Propagation Delay Time
Clock to Q
t
PLH
, t
PHL
= (1.7 ns/pF) CL + 415 ns
t
PLH
, t
PHL
= (0.66 ns/pF) CL + 177 ns
t
PLH
, t
PHL
= (0.5 ns/pF) CL + 130 ns
Clock to S
out
t
PLH
, t
PHL
= (1.7 ns/pF) CL + 665 ns
t
PLH
, t
PHL
= (0.66 ns/pF) CL + 277 ns
t
PLH
, t
PHL
= (0.5 ns/pF) CL + 195 ns
Clock to EOC
t
PLH
, t
PHL
= (1.7 ns/pF) CL + 215 ns
t
PLH
, t
PHL
= (0.66 ns/pF) CL + 97 ns
t
PLH
, t
PHL
= (0.5 ns/pF) CL + 75 ns
t
PLH
,
t
PHL
5.0 10 15
5.0 10 15
5.0 10 15
— — —
— — —
500 210 155
750 310 220
300 130 100
1000
420 310
1500
620 440
600 260 200
ns
SC, D, FF or MR Setup Time t
su
5.0 10 15
250 100
80
125
50 40
— — —
ns
Clock Pulse Width t
WH(cl)
5.0 10 15
700 270 200
350 135 100
— — —
ns
Pulse Width — D, SC, FF or MR t
WH
5.0 10 15
500 200 160
250 100
80
— — —
ns
Clock Rise and Fall Time t
TLH
,
t
THL
5.0 10 15
— — —
15
1.0
0.5
µs
Clock Pulse Frequency f
cl
5.0 10 15
— — —
1.5
3.0
4.0
0.8
1.5
2.0
MHz
*The formulas given are for the typical characteristics only.
MOTOROLA CMOS LOGIC DATAMC14549B MC14559B
4
SWITCHING TIME TEST CIRCUIT AND WAVEFORMS
1
f
cl
t
WH(cl)
50%
50%
t
su
t
su
t
su
t
WH(D)
t
PHL
t
PLH
50%
50%
90%
10%
t
TLH
t
PLH
t
THL
90%50%
10%
t
TLH
S
out
Q7
D
SC
C
NOTE: Pin 10 = V
SS
C
L
C
L
C
L
C
L
C
L
C
L
C
L
C
L
C
L
C
L
V
DD
V
SS
Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
EOC
S
out
C
SC
FF(MR)
D
PROGRAMMABLE
PULSE
GENERATOR
TIMING DIAGRAM
* — Q8 is ninth–bit of serial information available from 8–bit register.
NOTE: Pin 10 = V
SS
INH — Indicates Serial Out is inhibited low.
— Don’t care condition
CLOCK
SC
D
Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
EOC
S
out
INHINH Q7
Q6 Q7 Q5 Q3 Q1 Q8*
INHQ6 Q4 Q2 Q0
MOTOROLA CMOS LOGIC DATA
5
MC14549B MC14559B
OPERATING CHARACTERISTICS
Both the MC14549B and MC14559B can be operated in either the “free run” or “strobed operation” mode for conver­sion schemes with any number of bits. Reliable cascading and/or recirculating operation can be achieved if the End of Convert (EOC) output is used as the controlling function, since with EOC = 0 (and with SC = 1 for MC14549B but either 1 or 0 for MC14559B) no stable state exists under con­tinual clocked operation. The MC14559B will automatically recirculate after EOC = 1 during externally strobed operation, provided SC = 1.
All data and control inputs for these devices are triggered into the circuit on the positive edge of the clock pulse.
Operation of the various terminals is as follows:
C = Clock — A positive–going transition of the Clock is required for data on any input to be strobed into the circuit.
SC = Start Convert — A conversion sequence is initiated on the positive–going transition of the SC input on succeed­ing clock cycles.
D = Data in — Data on this input (usually from a compara­tor in A/D applications) is also entered into the circuit on a positive–going transition of the clock. This input is Schmitt triggered and synchronized to allow fast response and guar­anteed quality of serial and parallel data.
MR = Master Reset (MC14549B Only) — Resets all out­put to 0 on positive–going transitions of the clock. If removed while SC = 0, the circuit will remain reset until SC = 1. This allows easy cascading of circuits.
FF = Feed Forward (MC14559B Only) — Provides regis­ter shortening by removing unwanted bits from a system.
For operation with less than 8 bits, tie the output
following
the least significant bit of the circuit to EOC. E.g., for a 6–bit
conversion, tie Q1 to FF; the part will respond as shown in the timing diagram less two bit times. Not that Q1 and Q0 will still operate and must be disregarded.
For 8–bit operation, FF is tied to VSS.
For applications with more than 8 but less than 16 bits, use the basic connections shown in Figure 1. The FF input of the MC14559B is used to shorten the setup. Tying FF directly to the least significant bit used in the MC14559B allows EOC to provide the cascading signal, and results in smooth transition of serial information from the MC14559B to the MC14549B. The Serial Out ( S
out
) inhibit structure of the MC14559B
remains inactive one cycle after EOC goes high, while S
out
of the MC14549B remains inhibited until the second clock cycle of its operation.
Qn = Data Outputs After a conversion is initiated the
Q’s on succeeding cycles go high and are then conditionally reset dependent upon the state of the D input. Once condi­tionally reset they remain in the proper state until the circuit is either reset or reinitiated.
EOC = End of Convert — This output goes high on the negative–going transition of the clock following FF = 1 (for the MC14559B) or the conditional reset of Q0. This allows settling of the digital circuitry prior to the End of Conversion indication. Therefore either level or edge triggering can indi­cate complete conversion.
S
out
= Serial Out Transmits conversion in serial fash-
ion. Serial data occurs during the clock period when the cor­responding parallel data bit is conditionally reset. Serial Out is inhibited on the initial period of a cycle, when the circuit is reset, and on the second cycle after EOC goes high. This provides efficient operation when cascaded.
Figure 1. 12–Bit Conversion Scheme
†Completion of conversion automatically re–initiates cycle in free run mode.
**Cascading using EOC guaranteed; no stable unfunctional state.
*FF allows EOC to activate as if in 4–stage register.
Q7 Q6 Q5 Q4 Q0 EOC
FF
SC
C
D
S
out
MC14559B
NC
MSB
TO D/A AND PARALLEL DATA
••
**
*
FROM A/D
COMPARATOR
Q7 Q6 Q5
MR
SC
C
D
S
out
MC14549B
LSB
Q4
Q3 Q2 Q1 Q0 EOC
TO D/A AND
PARALLEL DATA
{
EXTERNAL STROBE
FREE RUN MODE
EXTERNAL
CLOCK
1/4 MC14001
SERIAL OUT (CONTINUAL UPDATE EVERY 13 CLOCK CYCLES)
MOTOROLA CMOS LOGIC DATAMC14549B MC14559B
6
TYPICAL APPLICATIONS
Externally Controlled 6–Bit ADC (Figure 2)
Several features are shown in this application:
Shortening of the register to six bits by feeding the seventh output bit into the FF input.
Continuous conversion, if a continuous signal is applied to SC.
Externally controlled updating (the start pulse must be shorter than the conversion cycle).
The EOC output indicating that the parallel data are valid and that the serial output is complete.
Continuously Cycling 8–Bit ADC (Figure 3)
This ADC is running continuously because the EOC signal is fed back to the SC input, immediately initiating a new cycle on the next clock pulse.
Continuously Cycling 12–Bit ADC (Figure 4)
Because each successive approximation register (SAR) has a capability of handling only an eight–bit word, two must be cascaded to make an ADC with more than eight bits.
When it is necessary to cascade two SAR’s, the second SAR must have a stable resettable state to remain in while awaiting a subsequent start signal. However, the first stage must not have a stable resettable state while recycling, be­cause during switch–on or due to outside influences, the first stage has entered a reset state, the entire ADC will remain in a stable non–functional condition.
This 12–bit ADC is continuously recycling. The serial as well as t he parallel o utputs are updated e very thirteenth clock pulse. T he EOC pulse indicates the completion of
Figure 2. Externally Controlled 6–Bit ADC
TO DAC
SC
C
S
out
Q7 Q6 Q5
MC14559B
Q4 Q3 Q2 Q1 Q0 EOCFF
Figure 3. Continuously Cycling 8–Bit ADC
TO DAC
SC
C
S
out
Q7 Q6 Q5
MC14559B
Q4 Q3 Q2 Q1 Q0 EOCFF
MOTOROLA CMOS LOGIC DATA
7
MC14549B MC14559B
Q7 Q6 Q5
MR
SC
C
S
out
MC14549B Q4 Q3 Q2 Q1 Q0 EOC
S
out
TO DAC
Q7 Q6 Q5
SC
C S
out
MC14559B
Q4 Q3 Q2 Q1 Q0 EOC
TO DAC
FF
EOC
Figure 4. Continuously Cycling 12–Bit ADC
the 12–bit conversion cycle, the end of the serial output word, and the validity of the parallel data output.
Externally Controlled 12–Bit ADC (Figure 5)
In this circuit the external pulse starts the first SAR and simultaneously resets the cascaded second SAR. When Q4 of the first SAR goes high, the second SAR starts conver­sion, and the first one stops conversion. EOC indicates that the parallel data are valid and that the serial output is com­plete. Updating the output data is started with every external control pulse.
Additional Motorola Parts for Successive Approximation ADC
Monolithic d igital–to–analog c onverters — The
MC1408/1508 converter has eight–bit resolution and is avail­able with 6, 7, and 8–bit accuracy. The amplifier–compara- tor block — The MC1407/1507 contains a high s peed operational amplifier and a high speed comparator with ad­justable window.
With these two linear parts it is possible to construct SA– ADCs with an accuracy of up to eight bits, using as the regis­ter one MC14549B or one MC14559B. An additional CMOS block will be necessary to generate the clock frequency.
Additional information on successive approximation ADC is found in Motorola Application Note AN–716.
Figure 5. Externally Controlled 12–Bit ADC
Q7 Q6 Q5
MR
SC
C
S
out
MC14549B
Q4 Q3 Q2 Q1 Q0 EOC
S
out
TO DAC
Q7 Q6 Q5
SC
C S
out
MC14559B
Q4 Q3 Q2 Q1 Q0 EOC
TO DAC
FF
EOC
MOTOROLA CMOS LOGIC DATAMC14549B MC14559B
8
OUTLINE DIMENSIONS
P SUFFIX
PLASTIC DIP PACKAGE
CASE 648–08
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
B
F
C
S
H
G
D
J
L
M
16 PL
SEATING
1 8
916
K
PLANE
–T–
M
A
M
0.25 (0.010) T
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A 0.740 0.770 18.80 19.55 B 0.250 0.270 6.35 6.85 C 0.145 0.175 3.69 4.44 D 0.015 0.021 0.39 0.53 F 0.040 0.70 1.02 1.77 G 0.100 BSC 2.54 BSC H 0.050 BSC 1.27 BSC J 0.008 0.015 0.21 0.38 K 0.110 0.130 2.80 3.30 L 0.295 0.305 7.50 7.74 M 0 10 0 10 S 0.020 0.040 0.51 1.01
____
L SUFFIX
CERAMIC DIP PACKAGE
CASE 620–10
ISSUE V
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL.
4. DIMENSION F MAY NARROW TO 0.76 (0.030) WHERE THE LEAD ENTERS THE CERAMIC BODY.
–A–
–B–
–T–
F
E
G
N
K
C
SEATING PLANE
16 PLD
S
A
M
0.25 (0.010) T
16 PLJ
S
B
M
0.25 (0.010) T
M
L
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A 0.750 0.785 19.05 19.93 B 0.240 0.295 6.10 7.49 C ––– 0.200 ––– 5.08 D 0.015 0.020 0.39 0.50 E 0.050 BSC 1.27 BSC F 0.055 0.065 1.40 1.65 G 0.100 BSC 2.54 BSC H 0.008 0.015 0.21 0.38 K 0.125 0.170 3.18 4.31 L 0.300 BSC 7.62 BSC
M 0 15 0 15
N 0.020 0.040 0.51 1.01
_ _ _ _
16 9
1 8
MOTOROLA CMOS LOGIC DATA
9
MC14549B MC14559B
OUTLINE DIMENSIONS
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751G–02
ISSUE A
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A 10.15 10.45 0.400 0.411 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.50 0.90 0.020 0.035 G 1.27 BSC 0.050 BSC J 0.25 0.32 0.010 0.012 K 0.10 0.25 0.004 0.009 M 0 7 0 7 P 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029
M
B
M
0.010 (0.25)
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION.
–A–
–B– P8X
G14X
D16X
SEATING PLANE
–T–
S
A
M
0.010 (0.25) B
S
T
16 9
81
F
J
R
X 45
_
_ _ _ _
M
C
K
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MC14549B/D
*MC14549B/D*
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